=====================================================
BUG: KMSAN: uninit-value in ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0
 ip6_tnl_parse_tlv_enc_lim+0x94f/0xbb0
 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]
 ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432
 __netdev_start_xmit include/linux/netdevice.h:4940 [inline]
 netdev_start_xmit include/linux/netdevice.h:4954 [inline]
 xmit_one net/core/dev.c:3548 [inline]
 dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564
 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349
 dev_queue_xmit include/linux/netdevice.h:3134 [inline]
 neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243
 dst_output include/net/dst.h:451 [inline]
 ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155
 ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]
 ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972
 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582
 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920
 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
 __sys_sendmsg+0x225/0x3c0 net/socket.c:2667
 __compat_sys_sendmsg net/compat.c:346 [inline]
 __do_compat_sys_sendmsg net/compat.c:353 [inline]
 __se_compat_sys_sendmsg net/compat.c:350 [inline]
 __ia32_compat_sys_sendmsg+0x9d/0xe0 net/compat.c:350
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
 slab_alloc_node mm/slub.c:3478 [inline]
 __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc_node_track_caller+0x118/0x3c0 mm/slab_common.c:1027
 kmalloc_reserve+0x249/0x4a0 net/core/skbuff.c:582
 pskb_expand_head+0x226/0x1a00 net/core/skbuff.c:2098
 __pskb_pull_tail+0x13b/0x2310 net/core/skbuff.c:2655
 pskb_may_pull_reason include/linux/skbuff.h:2673 [inline]
 pskb_may_pull include/linux/skbuff.h:2681 [inline]
 ip6_tnl_parse_tlv_enc_lim+0x901/0xbb0 net/ipv6/ip6_tunnel.c:408
 ipxip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline]
 ip6_tnl_start_xmit+0xab2/0x1a70 net/ipv6/ip6_tunnel.c:1432
 __netdev_start_xmit include/linux/netdevice.h:4940 [inline]
 netdev_start_xmit include/linux/netdevice.h:4954 [inline]
 xmit_one net/core/dev.c:3548 [inline]
 dev_hard_start_xmit+0x247/0xa10 net/core/dev.c:3564
 __dev_queue_xmit+0x33b8/0x5130 net/core/dev.c:4349
 dev_queue_xmit include/linux/netdevice.h:3134 [inline]
 neigh_connected_output+0x569/0x660 net/core/neighbour.c:1592
 neigh_output include/net/neighbour.h:542 [inline]
 ip6_finish_output2+0x23a9/0x2b30 net/ipv6/ip6_output.c:137
 ip6_finish_output+0x855/0x12b0 net/ipv6/ip6_output.c:222
 NF_HOOK_COND include/linux/netfilter.h:303 [inline]
 ip6_output+0x323/0x610 net/ipv6/ip6_output.c:243
 dst_output include/net/dst.h:451 [inline]
 ip6_local_out+0xe9/0x140 net/ipv6/output_core.c:155
 ip6_send_skb net/ipv6/ip6_output.c:1952 [inline]
 ip6_push_pending_frames+0x1f9/0x560 net/ipv6/ip6_output.c:1972
 rawv6_push_pending_frames+0xbe8/0xdf0 net/ipv6/raw.c:582
 rawv6_sendmsg+0x2b66/0x2e70 net/ipv6/raw.c:920
 inet_sendmsg+0x105/0x190 net/ipv4/af_inet.c:847
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584
 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638
 __sys_sendmsg+0x225/0x3c0 net/socket.c:2667
 __compat_sys_sendmsg net/compat.c:346 [inline]
 __do_compat_sys_sendmsg net/compat.c:353 [inline]
 __se_compat_sys_sendmsg net/compat.c:350 [inline]
 __ia32_compat_sys_sendmsg+0x9d/0xe0 net/compat.c:350
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

CPU: 0 PID: 6396 Comm: syz-executor.3 Not tainted 6.7.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================